Ugh this one gets murky but I do agree with your take. I genuinely cannot tell what exactly is happening but its definitely not an arm action. The rear shoulder has a feeling to me when I play around and concentrate on it, but in the end, if you are consciously using the rear arm or rear shoulder as a swing-thought its probably not going to work out.
I can absolutely see someone looking at GG and thinking there is more to it, but the reality of what is happening with the rear shoulder/arm is not very exciting in the end.
Still trying to figure this out. At this moment i just try to keep it close to my body, so it doesn't act like dead weight.
How does the rear arm get "natural" to its correct place? Is it a matter of a good brace? Proper swing motion? Having a hard time here lol.
This is why I don't agree with huge flurishes on your backswing with the off arm.
Drew holds his tight and relaxes it when he braces and just lets it fall.
I've always had an off arm issue being a huge chicken wing, so I've been holding the back of my hand on my buttcheek and actively trying to keep it there till it does it on its own.
But when my arm is back there, its a far more powerful swing even with me trying to hold it from chicken winging vs me trying to drive it through or whatever else.
But that's the whole idea behind the swim move talked about here. And I felt as if it was an active move for a long time where we needed to swim, but it's more of a passive move, the body will naturally counter the forces we are putting into the swing, we dont need to help it.
and yes, it looks like some of the top pro's are doing some fancy move with their off arm, and they might be, but if you get yourself into position properly and swing, it will look like you are too, because our body has 2 sides to it, the other side has to do something.
And a lot of these players weird things are from stuff they have tried over the years, old swings, or just ways they have found to keep things tight.
I think that in the high end of things there are some little things you can do with it, but that's speculation at this point.
My form is so jacked as it is over the years of trying everyones things trying to figure out how it works or if it works and stuff. The off arm was a 3 year journey and I can confidently say, there is no magical off arm thing except to keep it close and let it do its natural thing.
GG's form is weird though, but he's been smashing discs since he was like 8, high distance.
And at one point GG was a BIG dude. His form is what it is. But its not some rotate the shoulders faster movement.
Its a resist the rotation style movement. The off arm is bracing for the swing. It's just obnoxious looking.